Lexus IS300 Manual Gearbox: An Overview
The Lexus IS300, while primarily known for its automatic transmission, has garnered significant interest in manual gearbox conversions.
This swap provides a more engaging driving experience for enthusiasts. Some regions even offered factory manual IS300s.
Manual Transmission Swap for IS300: Is it Worth it?
The question of whether a manual transmission swap for an IS300 is “worth it” is subjective and depends heavily on individual preferences and priorities. For driving enthusiasts seeking a more connected and engaging experience, the swap can be incredibly rewarding. The manual gearbox offers greater control over gear selection, allowing for more precise acceleration and deceleration, particularly beneficial for drifting or track days.
However, the financial implications must be considered. Manual swaps require purchasing the transmission, clutch, pedal box, driveshaft, and potentially a new ECU. Furthermore, the labor costs for installation can be significant if not performing the swap yourself. It is important to weigh the performance benefits against the overall cost to determine if the manual transmission swap aligns with your budget and driving goals. Ultimately, the “worth” is determined by how much you value the enhanced driving experience.
Popular Manual Transmission Options for IS300
Several manual transmission options exist for the IS300 swap. The W58 and CD009 (350Z/370Z) are popular choices. Each has its pros and cons regarding cost, strength, and ease of installation, influencing the decision.
W58 Transmission
The W58 transmission is a 5-speed gearbox often considered for IS300 manual swaps due to its relative affordability and availability. Coming from various Toyota models, including Supras and Celicas, finding a used W58 is generally easier on the budget. However, it’s crucial to acknowledge the W58’s power limitations compared to other options.
For heavily modified IS300s pushing significant horsepower, the W58 may not be the most robust choice. Many have found success with this transmission in moderately powered applications, making it a suitable entry-level swap. When sourcing a W58, ensure to inspect its condition, checking for wear on gears and synchros. Pairing the W58 with the correct flywheel and clutch setup designed for the IS300’s 2JZ engine is essential for proper function. Adapting the shifter linkage and driveshaft will also be necessary.
CD009 (350Z/370Z) 6-Speed Transmission
The CD009, a 6-speed manual transmission found in Nissan 350Z and 370Z models, presents a robust and highly regarded option for IS300 manual swaps. Its strength and smooth shifting characteristics make it a popular choice for those seeking enhanced performance and reliability. While more expensive than the W58, the CD009 offers a significant upgrade in terms of power handling and overall durability, making it suitable for both street and track applications.
Successfully integrating a CD009 requires an adapter kit specifically designed for the IS300 and 2JZ engine. These kits typically include an adapter plate, flywheel, and necessary hardware. Due to the CD009’s larger size, some modification to the transmission tunnel may be necessary for proper fitment. The driveshaft will also need to be custom-made or modified to match the CD009’s output shaft. Furthermore, careful consideration must be given to shifter placement and linkage to ensure comfortable and precise gear changes.
Essential Parts for an IS300 Manual Swap
A successful IS300 manual swap requires specific parts. These include a transmission tunnel cover, clutch setup, pedal box, and a manual IS300 driveshaft. Sourcing quality components ensures a reliable and enjoyable conversion.
Transmission Tunnel Cover
When performing a manual transmission swap on an IS300, addressing the transmission tunnel is crucial for a clean and functional installation. The original automatic transmission tunnel often requires modifications to accommodate the larger manual gearbox. A transmission tunnel cover is essential to seal up the tunnel after any necessary trimming.
This cover prevents debris, moisture, and unwanted noise from entering the cabin. Many aftermarket tunnel covers come with integrated nuts for bolting down the OEM manual IS200 gearstick, simplifying the installation process. Ensuring a proper seal is vital for maintaining a comfortable and factory-like interior environment.
Clutch Setup and Pedal Box
A crucial aspect of converting an automatic IS300 to a manual transmission involves installing a proper clutch setup and pedal box. The original automatic IS300 lacks the necessary components for manual clutch operation, necessitating a complete replacement;
The clutch setup typically includes the clutch disc, pressure plate, and release bearing. Selecting a suitable clutch depends on the intended use of the vehicle, with options ranging from stock replacements to performance-oriented upgrades. A manual pedal box, including the clutch pedal and associated linkages, is essential for actuating the clutch. Sourcing a pedal box from a manual IS300 or an aftermarket solution is necessary for this conversion.
Manual IS300 Driveshaft
When performing a manual transmission swap on an IS300, the driveshaft is a vital component that needs careful consideration. The automatic transmission driveshaft is not compatible with a manual gearbox. This incompatibility arises from differences in length, spline count, and overall design.
A manual IS300 driveshaft is specifically designed to connect the manual transmission to the rear differential, ensuring proper power transfer. Obtaining a driveshaft from a factory manual IS300 is the most straightforward solution. Alternatively, a custom driveshaft can be fabricated to match the specific transmission and differential setup. Ensure the driveshaft is properly balanced and rated for the expected power levels to prevent vibrations and potential failure.
IS300 Manual Swap Kits
Manual swap kits provide a convenient way to gather necessary components for converting an automatic IS300 to manual. These kits often include essential parts, streamlining the conversion process.
Collins Performance Technologies Swap Kits
Collins Performance Technologies (CPT) specializes in engine and transmission swap kits, catering to drifting and drag racing applications. Their kits are designed for high performance and horsepower vehicles, supporting engine swaps like 2JZGTE, 1JZGTE, and LS series into platforms such as the Lexus IS300. CPT offers a Lexus IS300 Manual 2JZ/1JZ Engine to CD009 (350Z/370Z 6-Speed) Manual Transmission Swap Kit.
These kits are engineered to facilitate the integration of robust manual transmissions into vehicles originally equipped with automatics. CPT’s swap kits provide a comprehensive solution, often including specialized components and detailed instructions to ensure a successful and reliable conversion. Their focus on high-performance applications makes them a popular choice for enthusiasts seeking to maximize the potential of their IS300s.
T56 Magnum-F 6-speed manual swap kit
The T56 Magnum-F 6-speed manual swap kit stands out as a premium option for converting a Lexus IS300 to manual transmission. This kit is designed for high-performance applications, offering increased strength and durability compared to other transmission choices. It’s a popular choice for enthusiasts looking to handle significant power upgrades to their 2JZ or 1JZ engines.
These kits often include everything necessary for the swap, such as the transmission itself, bellhousing, clutch setup, and sometimes even a driveshaft. The T56 Magnum-F is known for its smooth shifting and robust construction, making it a favorite among those seeking a reliable and engaging manual driving experience. Its availability as a complete kit simplifies the conversion process, saving time and effort.
Wiring and ECU Considerations for IS300 Manual Conversion
Converting an automatic IS300 to a manual transmission necessitates careful attention to wiring and ECU (Engine Control Unit) considerations. The automatic transmission ECU must be bypassed or replaced to avoid error codes and ensure proper engine operation. This often involves modifying the existing wiring harness to accommodate the manual transmission’s sensors and switches.
Some enthusiasts opt for standalone ECUs or piggyback systems to manage engine functions more effectively after the swap. These aftermarket solutions provide greater control over fuel delivery, ignition timing, and other parameters, optimizing performance for the manual setup. Careful research and professional assistance are recommended to navigate the complexities of wiring and ECU integration during an IS300 manual conversion. It ensures a seamless and reliable driving experience.
Modifying the Electrical System for Manual Transmission
Modifying the electrical system is a crucial aspect of converting an automatic Lexus IS300 to a manual transmission. The original wiring harness is designed for the automatic transmission’s specific sensors and solenoids, which are no longer needed after the swap. Careful rewiring is required to integrate the manual transmission’s components, such as the reverse light switch and potentially a clutch switch.
A key step involves addressing the automatic transmission ECU, which will generate error codes if left connected. This can be resolved by either removing the ECU entirely or using a simulator to mimic the presence of the automatic transmission. Furthermore, wiring for features like cruise control and the speedometer may need adjustments to function correctly with the manual transmission setup. Professional guidance is highly recommended to ensure proper electrical integration.
Where to Find Parts and Kits for IS300 Manual Conversion
Sourcing the necessary parts for an IS300 manual conversion can be approached through various avenues. Online marketplaces like eBay often list used transmissions, driveshafts, and other components. Dedicated forums such as my.is are valuable resources for finding parts from other enthusiasts or vendors specializing in IS300 modifications. Companies like Collins Performance Technologies offer complete swap kits, simplifying the process by providing most essential components in one package.
Furthermore, junkyards can be a cost-effective option for obtaining parts like pedal boxes and clutch cylinders, although careful inspection for wear and tear is crucial. Retailers like Driftmotion specialize in performance parts for JZ-powered cars and may carry relevant components. Local auto parts stores can supply consumables like fluids, hardware, and wiring supplies. Thorough research and comparison shopping are recommended to ensure the best deals and quality parts for your conversion.
DIY vs. Professional Installation for IS300 Manual Swap
The decision between DIY and professional installation for an IS300 manual swap hinges on several factors, including mechanical skill, available tools, and budget. A DIY approach can save on labor costs, but demands significant technical knowledge, patience, and access to specialized tools like a transmission jack and welding equipment. Tasks like modifying the transmission tunnel and wiring can be complex and time-consuming.
Professional installation, while more expensive, offers the expertise of experienced mechanics who have performed similar swaps. This can ensure proper fitment, functionality, and reliability. Professionals can also handle intricate tasks like ECU tuning and custom fabrication. Choosing a reputable shop with a proven track record in IS300 conversions is crucial for a successful outcome. Ultimately, the best option depends on individual capabilities and comfort levels;
Cost Considerations for IS300 Manual Transmission Conversion
Undertaking an IS300 manual transmission conversion involves a range of costs that can vary significantly. Key components like the transmission itself (W58, CD009, or T56 Magnum) constitute a major expense. The clutch setup, including the clutch disc, pressure plate, and flywheel, also adds to the bill. A manual IS300 driveshaft or a custom-fabricated one is necessary, alongside a pedal box assembly and potentially a new center console.
Additional expenses include fluids, wiring modifications, and potentially ECU tuning. The cost of a swap kit can range significantly depending on the included parts. Labor costs are a major factor if opting for professional installation. Unexpected issues or the need for additional parts can further increase the overall cost. Budgeting for contingencies is crucial to avoid surprises during the conversion process.
Performance Benefits of a Manual IS300
Converting an IS300 from an automatic to a manual transmission can yield several performance benefits for driving enthusiasts. A manual gearbox provides greater control over the engine’s power band, allowing for quicker acceleration and more precise gear selection. This enhanced control is particularly advantageous for spirited driving, drifting, or track use. The driver can directly influence the car’s behavior.
Manual transmissions offer a more engaging and connected driving experience. The ability to downshift and rev-match allows for better control during cornering and braking. A manual swap can potentially reduce drivetrain loss compared to the automatic, leading to improved power delivery to the wheels. Many drivers find the overall driving experience more rewarding and enjoyable with a manual transmission in their IS300.
